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- <title>Basic Operation</title>
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- <h2>Basic Operation</h2>
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- <p>This section explains the following:</p>
-
- <dl>
- <dt>How does it all work?</dt>
- <dt>What the heck is RPN?</dt>
- <dt>How do I find out what do all of the buttons do?</dt>
- <dt>What are "Formula Screens"?</dt>
- </dl>
-
- <h3><a name="b1"></a>How does it all work?</h3>
-
- <blockquote>
- <p>When you launch CoolCalc, you'll see the main menu screen.
- This screen is a gateway to various calculators and formula
- screens. Simply tap any one of the buttons to go to that
- place. There are three basic calculators that come with
- CoolCalc: a Business Calculator, an RPN Business Calculator,
- and an RPN Scientific calculator.</p>
- </blockquote>
-
- <h3><a name="b2"></a>What the heck is RPN?</h3>
-
- <blockquote>
- <p>RPN stands for "Reverse Polish Notation"; this
- is a system that was patented by Hewlett-Packard in the 1970s
- as an alternate way of doing calculations that is used mostly
- by engineering folks. If you look at one of the RPN
- calculator screens, you won't see an equals key. This is OK.
- Instead, you'll see a key labeled "ENT" or
- "Enter". The "Enter" key saves the value
- in the display for use later. This is best illustrated by
- some examples:</p>
- </blockquote>
-
- <blockquote>
- <p><strong>Calculate 6x3:</strong></p>
- </blockquote>
-
- <blockquote>
- <blockquote>
- <p>Non-RPN: press <strong>6</strong>, then <strong>X</strong>,
- then <strong>3</strong>, then <strong>=</strong></p>
- <p>RPN: press <strong>6</strong>, then <strong>ENT</strong>,
- then <strong>3</strong>, then <strong>X</strong></p>
- </blockquote>
- <p>RPN becomes more useful when doing complicated
- calculations, as shown in this example:</p>
- </blockquote>
-
- <blockquote>
- <p><strong>Calculate 3x(4+5):</strong></p>
- </blockquote>
-
- <blockquote>
- <blockquote>
- <p>Non-RPN: press <strong>3, X, (, 4, +, 5, ), =</strong></p>
- <p>RPN: press <strong>3, ENT, 4, ENT, 5, +, X</strong></p>
- </blockquote>
- </blockquote>
-
- <h3><a name="b3"></a>How do I find out what do all of the buttons
- do?</h3>
-
- <blockquote>
- <p>Hold down the Alt key, and tap a button. You'll get a
- brief description of what that button does. Note that some of
- the calculators have blank buttons; these blank buttons can
- be assigned to special functions of your choosing (see Macros
- in the Advanced section for details on how to do this).</p>
- </blockquote>
-
- <h3><a name="b4"></a>What are "Formula Screens"?</h3>
-
- <blockquote>
- <p>One of the nifty features of CoolCalc is the ability to
- set up formula screens. We've included a few handy things
- such as some metric conversions, loans, and time value of
- money calculations. You can add your own as well, as you'll
- see later on. Go to the main menu, select <strong>Formulas</strong>,
- and explore a little. You can always return to the main menu
- by tapping on the <strong>home</strong> button.</p>
- <p>Formula screens are the friendly cousins of spreadsheets,
- with the advantages of having a nicer interface, and the
- ability to do "what if" scenarios very easily. For
- example, if you are a Realtor working on a loan with a
- customer, you can set the amount of the loan, and calculate
- the payment. Or, you can set the desired monthly payment, and
- figure out how much money your client can borrow.</p>
- </blockquote>
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